Oil filter



Jan. 20, 1953 D. A. MACRO' OIL. FILTER 2 SHEETS-SHEET 2 Filed Feb. 14,1951 2 0 4 I: 6 2 7| 6 m m 5 I l 6 I m I E 4 I v a w 3 I //r/ /////r/1/I// 7 F I w I David A. Macro v INVEIYTUR.

Patented Jan. 20, 1953 UNITED STATES E'FICE 1 Claim.

The present invention relates to improvements in filters and moreparticularly to oil filters adapted for use in the oil system of aninternal combustion engine.

'An object of the present invention is to provide an oil filter unitwhich is of such construction that the same may be readily applied touse in combination with internal combustion engines and wherein the oilfilter is constructed for ready removal of the filter material wherebythe filter material may be replaced after a redetermined amount of use.

A further object of the present invention resides in the provision of anoil filter vnit wherein the filtering material is readily removable andreplaceable and wherein the structure of the oil filter unit is not ofthe expandable type, as in previous oil filters wherein cartridges ofthe replaceable type were employed for insertion and removal whennecessary.

Still another object of the present invention resides in the novelconstruction of the oil filter unit whereby the oil must necessarilytravel through a tortuous path within the filter unit and also passthrough the filter material along longitudinal lines rather than alongradial lines as in filter cartridges of present-day use.

Still another object of the present invention is to provide an oilfilter unit wherein the casing is provided with a removable cover and afilter means within the casing, the filter means including a cylindricalassembly receiving filter material therein, and wherein the filter meansis of the construction that can be invertedwhen it is desired to alterthe fiow through the filter material so that a less tortuous path isprovided.

Various other objects and advantages will become apparent from thedetailed description to iollow.- The best forms 'in which I havecontemplated applying my invention are clearly illustrated in theaccompanying drawings, wherein:

Figure 1 is a vertical sectional view through a first form of oilfilter;

Figure 2 is a side elevational view of the filter means of the oilfilter of Figure 1, but wherein the filter means is in inverted positionfor reinsertion into the casing of the filter unit for a modified fiowthrough the casing, with parts broken away;

Figure 3 is a vertical sectional view through "the casing of a modifiedform of oil filter and showing the filter means mounted therein withparts'broken away;

Figure 4 is a horizontaldetail sectional view taken substantially alongthe plane of line 4--4 of Figure 3; and I I (Cl. 21il-131) Figure 5 is adetail side elevational view of a portion of the filter unit of Figure 3and showing the attaching bracket secured to the underside of thecasing.

Referring more particularly to the drawings, wherein like numeralsdesignate like parts throughout, the numeral iii designates generallyfirst form of filter unit while the numeral 52 designates a second formof filter unit, the two forms of units being shown in Figures 1 and 3,respectively.

The form of filter shown in Figure l is comprised of a casing i4 and afilter means l6 mounted therein. The casing it is comprised of asubstantially cylindrical wall 18 having a conical bottom wall 29 and anopen upper end at 22. A closure cap 2 1, of conical form. and having afiat top at 26, has a peripheral flange portion 28 which is annularlyrecessed at 3B for engagement with the upper end 22 of the cylindricalwall it. The recess 30 is provided with a seal of annular form 32,whereby engagement between the closure cap 24 and cylindrical wall l8will prevent leakage of oil from the casing Id.

The bottom wall 20 of the casing M is formed with an opening at 34 inwhich is received a drain plug 35 whereby draining of the oil from thecasing and flushing of the casing can be accomplished. The cylindricalwall i8 is formed with a tubular outlet 38 which is adjacent its upperedge 22.

The bottom wall 25! is formed with an opening at it and a bushing member42 has its reduced diameter portion Ml extending through the opening 49and formed with the L-shaned bore 45. The enlarged portion d8 of thebushing 42 terminates in a flanged portion at 50 and has a bore I 52therethrough in communication with the L-shaned bore 155. The enlargedportion 48 is also formed with a counterbore at 54 which is alsointernally threaded. An L-shaped inlet pipe, which may be comprised of apair of pipes, extends through the bores 52 and 46 of the bushing member62 and has its outer end 56 adapted to be connected to an oil line ofthe lubricating system of the internal combustion engine, -The inner end53 of the pipe terminateswithin the casing 14 immediately abovetheflange portion 50 of the bushing member 42. v

A tubular member 60 having a lowerexteriorthreaded end 62 is threadablyengaged with-- in the counterbore 54 of the-bushing member 32 and isdisposed in upstanding relation within the casing it of the filter unit.The tube: 68' is formed with a plurality of apertures .84 which extendsubstantially throughout its entire length.

The upper imperforate end 66 of the tube 60 is internally threaded at 68and an attaching plug it is disposed through an opening I2 in theclosure cap 2 and has its reduced diameter exteriorly threaded portionI4 received within the internally threaded portion of the tube til at68.

The filter means I6 is comprised of a tubular core 1% having a pluralityof apertures it formed throughout one-half of its length and at theupper portion thereof. The other cylindrical wall of the filter means i8includes upper and lower sections 80 and 82, the lower wall section 82having an ofiset portion at 84 whereby the upper wall section 88 can bereceived thereon to provide a unitary outer cylindrical wall. The lowerwall section 32 is also formed with a plurality of openings 8t and has aunitarily formed horizontally extending bottom wall 88 interconnectingthe tube it with the outer cylindrical wall at the bottom thereof. Thebottom Wall 88 is apertured and has an upturned flange 9B surroundingthe opening for engagement with the lower end portion of the tube I6.

The upper wall section 89 is exteriorly threaded at 92 and a disk-likecover 94 has a downwardly extendin fiange 95 at its outer periphery forengagement with the exteriorly threaded portion 92 of the wall section80. The central portion of the cover 94 is apertured at 98 for slidableengagement with the tube 60 and has an annular boss Hit in engagementwith the upper end of the tubular core 76. A filtering material IE2 isdisposed between the tubular core 76 and the outer cylindrical wallsections 85 and 82.

As shown in Figure 1, the flow through the oil filter device will befrom the inlet pipe 55 into the tube 83 and out through the apertures Edtherein. The oil will then pass through the aper ture it formed in theupper part of the tubular core '56, down through the filter material K52and out through the apertures 86 in the lower wall section 82. Thefiltered oil will then pass through the outlet 38 for the re-circulationin the system.

Figure 2 shows the filtering means 5!) in inverted position with theapertured lower wall section 82 above the upper wall section 8d.Similarly, the tubular core i6 is in inverted position with theapertures 18 at the lower end of the filter means. Thus, flow from theoutlet end 58 of the inlet pipe 55 will be through the apertures 64 inthe tube 69, through the apertures I8 adjacent the bottom end of thetube 69, up through the filter means H12 and out through the apertures86 in the wall section 82 and from there to the outlet 38 forre-circulation.

In assembling the filter device, the filter means it is provided withunused filter material I02 and the closure 9% is secured thereon. Thefilter means It is then inserted into the casing HI and receives thetube 60 therethrough. A coil compression spring I83 is engaged about thetube 68 and abuts the closure 94 of the filter means IE. The cap 25 isthen placed over the upper edge of the cylindrical wall I Sand theattaching plug it is threadably engaged within the tube 68 to provide afuel unit.

Looking now at Figures 3 through 5, it will be seen that the modifiedform of filter device I2 is comprised of a cylindrical casing I66 havinga fiat bottom wall I88 and an open upper end ii 8. An attaching bracketI I2 is secured to the underside of the bottom wall I08 and isperpendicular thereto. The attaching bracket II2 has a plurality ofapertures I I l therethrough whereby the filter device E? can be securedto a preselected portion of the internal combustion engine. Theattaching bracket H2 has further apertures I I6 which are adapted toreceive portions of pipes extending therethrough.

A closure cap i I8 is provided for the open upper end N9 of thecylindrical wall I56 and has a downwardly extending annular flangeportion I29 engaged over the upper outer periphery of the cylindricalwall M5. The central portion of the cap H8 is raised at I22 and has aflat circular portion I24 apertured at I28. The casing is also providedwith an opening adjacent the bottom wall I93 at I28 which is selectivelyclosed by the closure plug I38 whereby the casing can be drained orflushed when needed.

A pair of inlet pipes I32 and I34 are vertically disposed adjacent thecylindrical wall Hill at opposite sides thereof and have their lowerends extending through apertures I 36 and I38 formed in the bottom wallits. Extension portions Hit and I42 of the pipes I32 and I34 extendthrough the openings lit in the attaching bracket H2 whereby the twoinlet pipes can be supplied with oil from the lubricating system of theinternal combustion engine.

The bottom wall 558 has a bushing element i Q4 centrally disposedthereon and overlying the aperture M6 which is in alignment with thebore I48 of the bushing element I l l. An outlet pipe IEQ has its lowerend extending through one of the openings i it in the attaching bracketI l2 for connection with the lubrication system for return of thefiltered oil. The pipe I58 extends through the bore 38 the bushingelement I it and terminates adjacent the upper end of the casing. Theupper end E52 or the outlet pipe 58 is formed with a pair of opposedopenings Had for the return flow of oil into the outlet pipe.

A sleeve or tube I56 has its lower end integrally formed with a fiangeI58 which is engaged on the bushing element Md for support thereby. Thesleeve E56 receives the outlet pipe list therethrough and has its upperhalf formed with a plurality of apertures I80. The uppermost end of thesleeve tilt is internally threaded at 8232. A plug I6 1 is insertedthrough the opening lit and has its enlarged head 5% overlying themouth. of the opening I25. The lower end of the attachingplug 66-; isinternally threaded into the upper threaded end it? of the sleeve I523.

The filterin means I3 of the oil filter I2 is similar to the filtermeans It of the oil filter It and is comprised of a lower cylindricalwall section 82 having a plurality of openings 36 formed therein. Atubular core I88 has a plurality of openings I'Iil formed throughout itslength and has its lower end supported on the bottom wall 238',integrally formed with the bottom wall sec tion 82. As in the form shownin Figure l, the bottom wall 85' is apertured and has an upturned flange89.

The filter means i3 also has an upper wall section as which is engagedover the reduced diameter portion 85' of the lower wall section 32. Thecap 9d is 'of disk form and has an annular flange portion I12 integrallyformed with the dish portion I74, The dish portion Ild has itsupstanding walls H6 slidably engaged within the upper inner periphery ofthe upper wall section 83. The central portion of the cap 9% isapertured and has an annular element H8 secured thereto. The cap asandanhular element H8 are received about the upper end of the sleeve Iand the compression spring I fi l is engaged between the closure I I8and the annular element I18 for normally urging the filtering means I3into engagement with the flange I58. Thus, the

entire filtering means I3 can be removed upon removal of the closure II8 from the casing of the oil filter unit.

As willjbe seen from a consideration of Figures 3 through 5, dirty oilfrom the engine will flow to the inletpipes I40 and I42 and willoverflow their upper ends into the annular space between the upper wallsection 80 and the cylindrical wall I06 of the casing. The oil will flowdownwardly and into the apertures 86 of the lower wall sec tlon 82. Theoil will then flow through the filter materialfIIlZ', upwardly, andradially inwardly, throughthe apertures I10 of the tubular core I68.Tile oil must then flow upwardly for en trance through the openings I60of the sleeve I56 and from there passes through the outlet openings I5and down through the outlet pipe I50 for re-circulation in thelubricating system of the internal'combustion engine.

In view of the foregoing, it is believed that a device has been providedwhich will accomplish all of the objects hereinabove set forth.

Having described the invention, what is claimed as new is:

An oil filter comprising a cylindrical container including a bottom anda removable closure, a vertical tube mounted centrally in said containerand having a perforated upper portion, an outlet pipe, mounted in thetube in spaced relation thereto, a cylindrical cartridge removably pmounted in the container and spaced concentrically therefrom fordefining an annular cham- REFERENCES CITED The following references areof record in the file of this patent:

UNITED STATES PATENTS Number Name Date 2,110,318 Baruch Mar. 8, 19382,122,310 Burt June 28, 1938 2,165,703 Holmes July 11, 1939 2,337,238Griffith Dec. 21, 1943 2,347,384 Winslow et al Apr. 25, 1944 2,357,572Baldwin Sept. 5, 1944 2,511,800 Wilkinson June 13, 1950

